Desk telephone apparatus



(No Model.)

G. W. GOY.

DESK TELEPHONE APPARATUS. No. 552,867. Patented Jan. 7, 1896.

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GEORGE XV. OOY, OF MILFORD, CONNECTICUT.

DESK TELEPHONE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 552,867, dated January '7, 1896.

Application filed April 1, 1895. Serial No. 544,012. (No model.)

To all whom it may concern:

13c it known that I, GEORGE COY, a citi' zen of the United States, and a resident of Milford, in the county of New Haven and State of Connecticut, have invented a certain new and useful Desk Telephone Apparatus, of which the following is a specification.

My invention relates to telephony, and par ticularly to a telephone apparatus wherein the switching is done by movement of the transmitting apparatus or any part thereof, and which telephone apparatus is in construction and arrangement adapted to be lo cated in a convenient place about a desk.

The apparatus is especially designed for interior circuits, though it may be used in the general exchange-circuits.

Inv a desk apparatus it is desirable to so construct and locate the parts thereof that they will not be in the way, and yet be readily accessible. Vith this end in view I mount all the parts of this apparatus in and upon a case that may be slid into a pigeon-hole or otherwise conveniently disposed about a desk, or I may locate the bell, battery, coil and microphone within a pigeon-hole and mount the remaining parts upon a door or end piece closing the pigeon-hole. Then to render the transmitting apparatus accessible, I make one part of it to consist of a speaking-tube which shall conduct the sound to the microphone. I also propose to do the switching by this part, substantially as hereinafter set forth.

To this end my invention consists in a telephone apparatus for desk use and embracing a fixed microphone having a movable speaking-tube leading thereto, in combination with a switch mechanism operable by said tube.

It also consists in the combination with a microphone of a movable speaking-tube leading thereto and provided with an air stop or valve operated by the movement of the tube.

My invention further consists in the construction, combination and arrangement of parts, as hereinafter set forth.

The switching mechanism forming one of the main features of this invention may be greatly varied, and several variations thereof form the subject-matter of applications filed by me March 15, 1895, Serial No. $1,850; April 1, 1895, Serial No. 544,011, and April 5, 1895, Serial No. 544,655.

Of the apparatus herein shown the parts not described in detail are such as are in general and common use and do not constitute a part of my invention.

In the drawings accompanying this specification and forming a part thereof, Figure 1. represents in front elevation a portion of a desk showing the arrangement of my apparatus in a pigeon-hole thereof. Fig. 2 represents diagrammatically one arrangement of said apparatus. Fig. 3 represents another arrangement of said apparatus. Fig. 4:1represents in vertical section a modification in the transmitting apparatus and switch mechanism.

In the drawings, A indicates the front wall of a drawer adapted to fit into a pigeon-hole of a desk or a board or plate of vulcauite or other non-conducting material which may be used to close said pigeon-hole.

lVhen a drawer is used, as indicated in Fig. 2, the bell B, the induction-coil C, the local battery D, the microphone E, and the major portion of the switch mechanism will be located within said drawer, or in case a drawer is not used said parts will be simply placed in the pigeonhole, the switch mechanism being mounted upon the plate which closes the pigeonhole.

In an interior system it is not necessary that the bell and receiver be provided with switches for alternately placing them in and out of the line, and in Fig. 2 I have shown them as connected in series with the induction-coil in the line-circuit 6. In this arrangement the only switch necessary is one for opening and closing the local circuit 7. This switch maybe formed in many ways, but the simplest form for operation by movement of telephone apparatus is represented in Fig. 2, and consists of an arm F rigidly mounted upon the front wall of the drawer, and an elbow-lever G pivoted at its angle and having an arm passing through said wall to co-opcrate with the arm F. This lever G makes and breaks connection with a contact 5 connected to the local circuit, said lever being also connected to the local circuit. In this form of apparatus the microphone is mounted in fixed position back of the plate A, and a tube, as Hin this instance a flexible tubeleads through said wall to the microphone and is provided at its free end with a suitable mouthpiece. hen the apparatus is not in use, this tube is placed between the arms F and G, thereby maintaining the local circuit open. To this lever G is connected a suitable spring for closing said circuit when the tube is removed from its support. The receiver I may be provided with any suitable support, as a hook J, fixed upon the wall A.

I11 the construction as thus described it will be seen that in using this apparatus the movable portion of the transmitting apparatus-namely, the tube I'I-in being removed from its support operates the switching mechanism to place the circuits in condition for speaking, and in being replaced again upon its support throws said circuits into the normal position. i

I have not shown the magneto, as itis of the usual form and arrangement, but have indicated at K the crank for operating it, which also is mounted upon the wall A.

In the construction shown in Fig. i the microphone is in a fixed position and communication had therewith through a hinged tube II, provided at its free end with a suitable mouthpiece. (Not shown.) The hinge of this tube consists of a cylindrical shell mounted within a cylindrical bearing I which has an opening at its rear in front of the microphone. The cylindrical shell of the tube also has an opening in line with the bore of the tube, which opening coincides with that of the bearing when said tube is raised into the proper speaking position, and which is closed by the walls of the bearing L when said tube is not in use, as in the position indicated in the drawings. In this manner an air stop or valve is formed which prevents any use of the apparatus until the tube II has been raised into speaking position. This operation is taken advantage of for the manipulation of the switch mechanism. 1 have indicated it as controlling the receiver and bell circuits by means of a contact 10, connected to the tube in a manner to engage with a contact 11, connected to the bell-circuit when the tube is in the position shown,and to engage with the contact 12 in the receiver-circuit when the tube is raised into the speaking position. It may, however, in an obvious manner, be adapted to the control of the local circuit. The common return 13 is shown connected to the support for the tube, through which support and the hinge of the tube current passes to the contact 10, the contacts 11 and 12 being insulated from said support. This tube H may, however,by the proper location of the switches of Figs. 2 and 3, be made to operate them in the same way as does tube H.

In the arrangement of apparatus and circuits shown in Fig. 3 I employ a switch which shall be operated by the movement of the tube II, to and from its support, to simultaneously affect the receiver, bell and local circuits. This switch consists of an elbow-level another for holding the speaking-tube be-- tween them, and for breaking the bell-circuit and closing the receiver-cirouit.

To open and close the local circuit I provide a push-pin, as O, mounted in a suitable bearing, and having a spring, as P, for forcing it outward, and bringing a contact Q, carried thereby,into engagement with contact 16,0011- nected to the local circuit.

In Fig. 3 the circuits are shown in condition for speaking, the tube having been removed from its support. IVhen through speaking, the tube is pushed in between the arms of levers M and N, and against the pin 0. This causes the bell-circuit to be closed at contact 9, the receiver-circuit to be opened at contact 15,and the local cireuitto be opened at contact 16. The projecting arms of the levers M and N are curved in a suitable manner to retain the tube between them against the pressure of the pin 0.

If desired, the microphone, instead of being fixed back of the plate A, and communication had therewith through the tube II, may be mounted upon the outer end of said tube,as indicated at E, Fig. 1, the conductors thereof being led to the rear of plate A through the tube.

Various other changes may be made in the construction and arrangement of parts without departing from the spirit of my invention.

Vhat I claim as my invention is- 1. In a telephone apparatus, the combination with switch mechanism thereof, of transmitting apparatus of which the transmitter is in a fixed position, and a speaking tube leading thereto and provided with an air stop or valve and adapted to operate the switch mechanism, substantially as set forth.

2. In a telephone apparatus, a switch mechanism consisting of two co-operating pivoted switch levers provided with proj ecting curved arms,and a spring-seated push-pin located between said arms in combination with a movable transmitting apparatus capable of insertion between said arms for the simultaneous operation of the parts of said switch mechanism.

Signed at New York, in the county of New York and State of New York, this 29th day of March, A. D. 1895.

GEORGE W. (TOY. Vitnesses WM. H. CAPEL, HENRY T. Hmson.

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